Desk telephone



FIG. 1 is a front elevational view of a desk telephone showing my new design;

FIG. 2 is a rear elevational view of my new design;

FIG. 3 is a right side elevational view of my new design;

FIG. 4 is a left side elevational view of my new design;

FIG. 5 is a top plan view of my new design; and

FIG. 6 is a bottom plan view of my new design. 

The ornamental design for a desk telephone, as shown and described. 